I don't know what others use but Pearsons still sell them round. WalMart has them, Walgreens sometimes has them and Sam's Club has them in a big bucket. They are a bit smaller and some think they taste different but its a round peppermint patty so it works for crafting. Plus I like the taste.

I also find the Pearsons round patties at my local food store ... Frys (kroger).
They have the peppermint patties and also the cookies n' cream patties. Both are very good. 2 bags for $3.00. They probably will be in the stores in about a month.